EP1073275A2 - Wireless communication system for video packet transmission - Google Patents

Wireless communication system for video packet transmission Download PDF

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Publication number
EP1073275A2
EP1073275A2 EP20000112408 EP00112408A EP1073275A2 EP 1073275 A2 EP1073275 A2 EP 1073275A2 EP 20000112408 EP20000112408 EP 20000112408 EP 00112408 A EP00112408 A EP 00112408A EP 1073275 A2 EP1073275 A2 EP 1073275A2
Authority
EP
European Patent Office
Prior art keywords
video data
data
importance
degree
video
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP20000112408
Other languages
German (de)
French (fr)
Other versions
EP1073275A3 (en
Inventor
Jeong-Hoon Park
Dong-Seek Park
Yung-Iyul Lee
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Samsung Electronics Co Ltd
Original Assignee
Samsung Electronics Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Samsung Electronics Co Ltd filed Critical Samsung Electronics Co Ltd
Publication of EP1073275A2 publication Critical patent/EP1073275A2/en
Publication of EP1073275A3 publication Critical patent/EP1073275A3/en
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/24—Systems for the transmission of television signals using pulse code modulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/234—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs
    • H04N21/2343—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements
    • H04N21/234327—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements by decomposing into layers, e.g. base layer and one or more enhancement layers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/24—Monitoring of processes or resources, e.g. monitoring of server load, available bandwidth, upstream requests
    • H04N21/2402—Monitoring of the downstream path of the transmission network, e.g. bandwidth available
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
    • H04N21/266—Channel or content management, e.g. generation and management of keys and entitlement messages in a conditional access system, merging a VOD unicast channel into a multicast channel
    • H04N21/2662—Controlling the complexity of the video stream, e.g. by scaling the resolution or bitrate of the video stream based on the client capabilities
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/61—Network physical structure; Signal processing
    • H04N21/6106—Network physical structure; Signal processing specially adapted to the downstream path of the transmission network
    • H04N21/6131—Network physical structure; Signal processing specially adapted to the downstream path of the transmission network involving transmission via a mobile phone network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
    • H04N21/647—Control signaling between network components and server or clients; Network processes for video distribution between server and clients, e.g. controlling the quality of the video stream, by dropping packets, protecting content from unauthorised alteration within the network, monitoring of network load, bridging between two different networks, e.g. between IP and wireless
    • H04N21/64784—Data processing by the network
    • H04N21/64792—Controlling the complexity of the content stream, e.g. by dropping packets

Definitions

  • the present invention relates to a wireless communication system for video packet transmission, and more particularly, to a wireless communication system for determining whether to transmit a video packet considering the degree of importance of video data.
  • moving picture information for video packet transmission is encoded through a video codec and encoded data is transmitted through a wireless channel with information items such as header added thereto, after passing through the respective layers of the wireless communication system.
  • the video data are required to be transmitted at a transmission rate which is larger than the bandwidth of the channel, namely, when a large amount of video data is required to be transmitted, a certain amount of data is buffered and transmitted in order for the bandwidth of the channel to handle the amount of data. In this way, the buffered data is delayed.
  • a wireless transmission system for transmitting a video packet through a wireless channel, comprising a video encoder for encoding a video signal on a block-by-block basis, a degree of importance determiner for determining the degree of importance of video data encoded in each block from predetermined parameters, a data transmission determiner for determining the transmission priority or whether to transmit the encoded video data on the basis of at least the amount of encoded video data to be transmitted per unit time, the wireless channel conditions, and the degree of importance of the encoded video data, a video data packetizing unit for packetizing the video data determined to be transmitted, and a wireless transmitter for wirelessly transmitting packetized data.
  • a wireless transmission system for transmitting a video packet through a wireless channel, comprising a video encoder for encoding a video signal on a block-by-block basis, a degree of importance determiner for determining the degree of importance of video data encoded in each block from predetermined parameters, a data transmission determiner for determining the transmission priority or whether to transmit the encoded video data on the basis of at least the amount of encoded video data to be transmitted per unit time, the wireless channel conditions, and the degree of importance of the encoded video data, a video and degree of importance data packetizing unit for packetizing the video data determined to be transmitted and inserting an information field which shows the degree of importance of the video data into a packet, and a wireless transmitter for wirelessly transmitting packetized data.
  • a wireless receiving system for receiving video packet data including an information field, which shows the degree of importance of packet data, in the packet data and recovering the received video packet data, comprising a wireless receiver for receiving the packet data, a packet assembling unit for separating from the packet data the information field, which shows the degree of importance of the video data, extracting encoded video data, and assembling the extracted video data, and a weight video decoder for determining the complexity of a recovery method according to the degree of importance of the video data and recovering the assembled video data by the recovery method having the determined complexity.
  • FIG. 2 is a block diagram of a wireless transmission system for transmitting video packet data according to the present invention.
  • the wireless transmission system of FIG. 2 includes a video encoder 200, a degree of importance determiner 202, a degree of importance storage unit 204, a video data transmission determiner 206, a video data packetizing unit 208, and a wireless transmitter 210.
  • the video encoder 200 encodes a moving picture to be transmitted.
  • the encoding can be performed in units of a 16 ⁇ 16-pixel macro block.
  • the degree of importance determiner 202 determines the degree of importance of the encoded data. Parameters for determining the degree of importance are whether video data is intra encoded or inter encoded, the motion vector value of the encoded video data, or whether the encoded video data falls on edge values.
  • the degree of importance determiner 202 can determine the degree of importance of the encoded data by putting weight values on the above-mentioned parameters.
  • the degree of importance storage unit 204 stores the degree of importance of encoded block units.
  • the video data transmission determiner 206 determines the transmission priority or whether to transmit the encoded video data according to the degree of importance stored in the degree of importance storage unit 204, considering the channel conditions such as the bandwidth of the wireless channel and the error probability of the channel. For example, if the amount of the video data to be transmitted per unit time exceeds the bandwidth of a wireless channel and the degree of importance of the current video data block is low, it is determined not to transmit the video data block or to lower the transmission priority. As another example, when the bandwidth of the channel available to a user is small, however, the user wishes video data of good quality to be transmitted, the video data transmission determiner 206 determines to transmit the data whose degree of importance is high and not to transmit or to transmit later the data whose degree of importance is low.
  • the video data packetizing unit 200 divides the video data determined to be transmitted by the video data transmission determiner 206 Into packets and adds information items such as a header to each packet.
  • the wireless transmitter 210 transmits video packets through the wireless channel.
  • the transmitted video packets are received by a receiver (not shown), processed in a reverse order to the order in which they are transmitted, decoded, and recovered.
  • FIG. 3A is a block diagram of another embodiment of a wireless transmission system for video packet data according to the present invention.
  • the wireless transmission system shown in FIG. 3A includes a video encoder 300, a degree of importance determiner 302, a degree of importance storage unit 304, a video data transmission determiner 306, a video and degree of importance data packetizing unit 312, and a wireless transmitter 310.
  • the operations of the video encoder 300, the degree of importance determiner 302, the degree of importance storage unit 304, and the video data transmission determiner 306 are the same as the operations of the corresponding elements shown in FIG. 2.
  • the video and degree of importance data packetizing unit 312 divides the data determined to be transmitted by the video data transmission determiner 306 into packets, adds information items such as the header to each packet, and inserts data on the degree of importance of the corresponding data block stored in the degree of importance storage unit 304 into the packet as one of the information items.
  • the wireless transmission unit 310 transmits the video packet into which the degree of importance data has been inserted.
  • the wireless receiving system shown in FIG. 3B includes a wireless receiver 320, a packet assembly unit 322, and a weight decoder 324.
  • the wireless receiver 320 receives the video packet.
  • the packet assembly unit 322 extracts the video data from the received video packet, separates the inserted degree of importance data from the video data, and assembles the extracted video data.
  • the weight decoder 324 decodes the video data by a decoding method, the complexity of which corresponds to the degree of importance of the corresponding video data. For example, when the received video data block has errors and the degree of importance of the received video data block is low, the block in which errors are generated 18 decoded and recovered by a well-known error concealment method. Since the degree of importance of the video data block is low, the video data block is decoded and recovered from the information items of blocks adjacent to the block in which errors are generated. When the degree of importance of the video data block is high, it is possible to conceal the errors using a method which has a better recovery performance.
  • the present invention it is possible to transmit video data, the amount of which is controlled for the fixed bandwidth of the wireless channel by determining the transmission priority or whether to transmit the video data by considering the degree of importance of the currently encoded video data.

Abstract

A wireless communication system for video packet transmission is provided. The wireless transmission system includes a video encoder for encoding a video signal on a block-by-block basis, a degree of importance determiner for determining the degree of importance of video data encoded in each block from predetermined parameters, a data transmission determiner for determining the transmission priority or whether to transmit the encoded video data on the basis of at least the amount of encoded video data to be transmitted per unit time, the wireless channel conditions, and the degree of importance of the encoded video data, a video data packetizing unit for packetizing the video data determined to be transmitted, and a wireless transmitter for wirelessly transmitting packetized data. It is possible to transmit the video data with the amount of the data controlled for the fixed bandwidth of the wireless channel by determining the transmission priority or whether to transmit the video data by considering the degree of importance of the currently encoded video data. Therefore, when the bandwidth of the allowed channel is small and the amount of data to be transmitted per unit time is large, it is possible to transmit the video data faster since the video data is not buffered unlike in the conventional technology.

Description

    BACKGROUND OF THE INVENTION 1. Field of the Invention
  • The present invention relates to a wireless communication system for video packet transmission, and more particularly, to a wireless communication system for determining whether to transmit a video packet considering the degree of importance of video data.
    • 2. Description of the Related Art
  • In general, in wireless communication systems, moving picture information for video packet transmission is encoded through a video codec and encoded data is transmitted through a wireless channel with information items such as header added thereto, after passing through the respective layers of the wireless communication system.
  • FIG. 1 is a block diagram of a conventional wireless transmission system for video packet transmission. The wireless transmission system shown in FIG. 1 includes a video encoder 100, a packetizing unit 102, and a wireless transmitter 104. The video encoder 100 encodes a moving picture to be transmitted. The packetizing unit 102 divides the encoded data in the form of packets and adds information items such as the header to each packet. The wireless transmitter 104 synchronously transmits video packet data through the wireless channel. In this case, the video encoder 100 must generate video data at a coding rate which is smaller than an allowed channel bandwidth. This is because information items such as header are added to the data transmitted through the channel in the lower layers of the wireless communication system, that is, the packetizing unit 102 and the wireless transmitter 104. Therefore, the video encoder 100 generates video data which is suitable for the allowed channel bandwidth.
  • However, when the video data are required to be transmitted at a transmission rate which is larger than the bandwidth of the channel, namely, when a large amount of video data is required to be transmitted, a certain amount of data is buffered and transmitted in order for the bandwidth of the channel to handle the amount of data. In this way, the buffered data is delayed.
  • In order to solve the above problem, a method in which more channel bandwidths are given should be provided. However, this method needs more transmission expenses since the amount of use of the channel increases.
    • SUMMARY OF THE INVENTION
  • To solve the above problem, it is an object of the present invention to provide a wireless transmission system for video packet transmission capable of determining the degree of importance of encoded video data and determining the transmission priority or whether to transmit corresponding video data according to the degree of importance, when the amount of the video data to be transmitted per unit time exceeds the bandwidth of a transmission channel.
  • It is another object of the present invention to provide a wireless receiving system for receiving video packet data which includes the degree of importance of the video packet data and for decoding the video packet data.
  • Accordingly, to achieve the first object, in one embodiment, there is provided a wireless transmission system for transmitting a video packet through a wireless channel, comprising a video encoder for encoding a video signal on a block-by-block basis, a degree of importance determiner for determining the degree of importance of video data encoded in each block from predetermined parameters, a data transmission determiner for determining the transmission priority or whether to transmit the encoded video data on the basis of at least the amount of encoded video data to be transmitted per unit time, the wireless channel conditions, and the degree of importance of the encoded video data, a video data packetizing unit for packetizing the video data determined to be transmitted, and a wireless transmitter for wirelessly transmitting packetized data.
  • In another embodiment, there is provided a wireless transmission system for transmitting a video packet through a wireless channel, comprising a video encoder for encoding a video signal on a block-by-block basis, a degree of importance determiner for determining the degree of importance of video data encoded in each block from predetermined parameters, a data transmission determiner for determining the transmission priority or whether to transmit the encoded video data on the basis of at least the amount of encoded video data to be transmitted per unit time, the wireless channel conditions, and the degree of importance of the encoded video data, a video and degree of importance data packetizing unit for packetizing the video data determined to be transmitted and inserting an information field which shows the degree of importance of the video data into a packet, and a wireless transmitter for wirelessly transmitting packetized data.
  • To achieve the second object, there is provided a wireless receiving system for receiving video packet data including an information field, which shows the degree of importance of packet data, in the packet data and recovering the received video packet data, comprising a wireless receiver for receiving the packet data, a packet assembling unit for separating from the packet data the information field, which shows the degree of importance of the video data, extracting encoded video data, and assembling the extracted video data, and a weight video decoder for determining the complexity of a recovery method according to the degree of importance of the video data and recovering the assembled video data by the recovery method having the determined complexity.
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • The above objects and advantages of the present invention will become more apparent by describing in detail a preferred embodiment thereof with reference to the attached drawings in which:
  • FIG. 1 is a block diagram of a conventional wireless transmission system for video packet transmission;
  • FIG. 2 is a block diagram of a wireless transmission system for video packet data according to the present invention;
  • FIG. 3A is a block diagram of another embodiment of the wireless transmission system for the video packet data according to the present invention; and
  • FIG. 3B shows a receiving system for receiving video packet data transmitted from the wireless transmission system shown In FIG. 3A and decoding the received video packets.
    • DESCRIPTION OF THE PREFERRED EMBODIMENTS
  • Hereinafter, embodiments of the present invention will be described in more detail with reference to the attached drawings. FIG. 2 is a block diagram of a wireless transmission system for transmitting video packet data according to the present invention. The wireless transmission system of FIG. 2 includes a video encoder 200, a degree of importance determiner 202, a degree of importance storage unit 204, a video data transmission determiner 206, a video data packetizing unit 208, and a wireless transmitter 210.
  • The video encoder 200 encodes a moving picture to be transmitted. The encoding can be performed in units of a 16×16-pixel macro block. The degree of importance determiner 202 determines the degree of importance of the encoded data. Parameters for determining the degree of importance are whether video data is intra encoded or inter encoded, the motion vector value of the encoded video data, or whether the encoded video data falls on edge values. The degree of importance determiner 202 can determine the degree of importance of the encoded data by putting weight values on the above-mentioned parameters. The degree of importance storage unit 204 stores the degree of importance of encoded block units. The video data transmission determiner 206 determines the transmission priority or whether to transmit the encoded video data according to the degree of importance stored in the degree of importance storage unit 204, considering the channel conditions such as the bandwidth of the wireless channel and the error probability of the channel. For example, if the amount of the video data to be transmitted per unit time exceeds the bandwidth of a wireless channel and the degree of importance of the current video data block is low, it is determined not to transmit the video data block or to lower the transmission priority. As another example, when the bandwidth of the channel available to a user is small, however, the user wishes video data of good quality to be transmitted, the video data transmission determiner 206 determines to transmit the data whose degree of importance is high and not to transmit or to transmit later the data whose degree of importance is low. The video data packetizing unit 200 divides the video data determined to be transmitted by the video data transmission determiner 206 Into packets and adds information items such as a header to each packet. The wireless transmitter 210 transmits video packets through the wireless channel. The transmitted video packets are received by a receiver (not shown), processed in a reverse order to the order in which they are transmitted, decoded, and recovered.
  • FIG. 3A is a block diagram of another embodiment of a wireless transmission system for video packet data according to the present invention. The wireless transmission system shown in FIG. 3A includes a video encoder 300, a degree of importance determiner 302, a degree of importance storage unit 304, a video data transmission determiner 306, a video and degree of importance data packetizing unit 312, and a wireless transmitter 310.
  • Here the operations of the video encoder 300, the degree of importance determiner 302, the degree of importance storage unit 304, and the video data transmission determiner 306 are the same as the operations of the corresponding elements shown in FIG. 2.
  • The video and degree of importance data packetizing unit 312 divides the data determined to be transmitted by the video data transmission determiner 306 into packets, adds information items such as the header to each packet, and inserts data on the degree of importance of the corresponding data block stored in the degree of importance storage unit 304 into the packet as one of the information items. The wireless transmission unit 310 transmits the video packet into which the degree of importance data has been inserted.
  • FIG. 3B shows a receiving system for receiving the video packet transmitted from the wireless transmission system shown in FIG. 3A and decoding the received video packet.
  • The wireless receiving system shown in FIG. 3B includes a wireless receiver 320, a packet assembly unit 322, and a weight decoder 324.
  • The wireless receiver 320 receives the video packet. The packet assembly unit 322 extracts the video data from the received video packet, separates the inserted degree of importance data from the video data, and assembles the extracted video data. The weight decoder 324 decodes the video data by a decoding method, the complexity of which corresponds to the degree of importance of the corresponding video data. For example, when the received video data block has errors and the degree of importance of the received video data block is low, the block in which errors are generated 18 decoded and recovered by a well-known error concealment method. Since the degree of importance of the video data block is low, the video data block is decoded and recovered from the information items of blocks adjacent to the block in which errors are generated. When the degree of importance of the video data block is high, it is possible to conceal the errors using a method which has a better recovery performance.
  • According to the present invention, it is possible to transmit video data, the amount of which is controlled for the fixed bandwidth of the wireless channel by determining the transmission priority or whether to transmit the video data by considering the degree of importance of the currently encoded video data. At this time, it is possible to select the complexity of the error concealment method to be adopted according to the degree of importance of the video data when the video data in which the errors are generated are recovered in the receiving system by transmitting data on the degree of importance of the video data together with the video data. Therefore, when the bandwidth of the allowed channel is small and the amount of data to be transmitted per unit time is large, it is possible to transmit the video data faster than the conventional technology, since the video data is not buffered.

Claims (5)

  1. A wireless transmission system for transmitting a video packet through a wireless channel, comprising:
    a video encoder for encoding a video signal on a block-by-block basis;
    a degree of importance determiner for determining the degree of importance of video data encoded in each block from predetermined parameters;
    a data transmission determiner for determining the transmission priority or whether to transmit the encoded video data on the basis of at least the amount of encoded video data to be transmitted per unit time, the wireless channel conditions, and the degree of importance of the encoded video data;
    a video data packetizing unit for packetizing the video data determined to be transmitted; and
    a wireless transmitter for wirelessly transmitting packetized data.
  2. The wireless transmission system of claim 1, wherein the degree of importance determiner determines the degree of importance of the video data by putting weight values on the parameters, which include whether the video data is intra encoded or inter encoded, the motion vector value of the encoded video data, or whether the encoded video data falls on edge values.
  3. A wireless transmission system for transmitting a video packet through a wireless channel, comprising:
    a video encoder for encoding a video signal on a block-by-block basis;
    a degree of importance determiner for determining the degree of importance of video data encoded in each block from predetermined parameters;
    a data transmission determiner for determining the transmission priority or whether to transmit the encoded video data on the basis of at least the amount of encoded video data to be transmitted per unit time, the wireless channel conditions, and the degree of importance of the encoded video data;
    a video and degree of importance data packetizing unit for packetizing the video data determined to be transmitted and inserting an information field which shows the degree of importance of the video data into a packet; and
    a wireless transmittor for wirelessly transmitting packetized data.
  4. The wireless transmission system of claim 3, further comprising:
    a wireless receiver for receiving the packet data;
    a packet assembly unit for separating from the packet data the information field which shows the degree of importance of the video data, extracting the encoded video data, and assembling the extracted video data; and
    a weight video decoder for determining the complexity of a recovery method according to the degree of importance of the video data and recovering the video data assembled by the recovery method having the determined complexity.
  5. A wireless receiving system for receiving video packet data induding an information field, which shows the degree of importance of packet data, in the packet data and recovering the received video packet data, comprising:
    a wireless receiver for receiving the packet data;
    a packet assembling unit for separating from the packet data the information field, which shows the degree of importance of the video data, extracting encoded video data, and assembling the extracted video data; and
    a weight video decoder for determining the complexity of a recovery method according to the degree of importance of the video data and recovering the assembled video data by the recovery method having the determined complexity.
EP20000112408 1999-06-12 2000-06-09 Wireless communication system for video packet transmission Withdrawn EP1073275A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR9921910 1999-06-12
KR19990021910A KR100580158B1 (en) 1999-06-12 1999-06-12 Wireless communication system for video packet transmission

Publications (2)

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EP1073275A2 true EP1073275A2 (en) 2001-01-31
EP1073275A3 EP1073275A3 (en) 2002-06-12

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JP (1) JP3870009B2 (en)
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CN (1) CN1164082C (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2849393A1 (en) * 2012-06-29 2015-03-18 Huawei Technologies Co., Ltd Method and device for transmitting video data
WO2020006291A1 (en) * 2018-06-28 2020-01-02 Apple Inc. Priority-based video encoding and transmission
US11451788B2 (en) 2018-06-28 2022-09-20 Apple Inc. Rate control for low latency video encoding and transmission
US11653026B2 (en) 2018-06-28 2023-05-16 Apple Inc. Video encoding system

Families Citing this family (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002030067A1 (en) * 2000-10-05 2002-04-11 Mitsubishi Denki Kabushiki Kaisha Packet retransmission system, packet transmission device, packet reception device, packet retransmission method, packet transmission method and packet reception method
JP2002141945A (en) * 2000-11-06 2002-05-17 Sony Corp Data transmission system and data transmission method, and program storage medium
US20020147834A1 (en) * 2000-12-19 2002-10-10 Shih-Ping Liou Streaming videos over connections with narrow bandwidth
US7043210B2 (en) * 2001-06-05 2006-05-09 Nortel Networks Limited Adaptive coding and modulation
KR100703295B1 (en) * 2001-08-18 2007-04-03 삼성전자주식회사 Method and apparatus for transporting and receiving data using antenna array in mobile system
US7743115B2 (en) * 2002-02-27 2010-06-22 Motorola, Inc. Software content downloading methods in radio communication networks
US7940844B2 (en) * 2002-06-18 2011-05-10 Qualcomm Incorporated Video encoding and decoding techniques
US20040008779A1 (en) * 2002-06-18 2004-01-15 Lai King Chung Techniques for video encoding and decoding
KR100508119B1 (en) * 2003-03-14 2005-08-10 엘지전자 주식회사 Device and the Method for processing image data
KR20050082499A (en) * 2004-02-19 2005-08-24 엘지전자 주식회사 Server system communicating through the wireless network and the control method of the same
KR100612691B1 (en) * 2004-04-30 2006-08-16 에스케이 텔레콤주식회사 Systems and Methods for Measurement of Video Quality
US8797926B2 (en) 2004-06-04 2014-08-05 Apple Inc. Networked media station
US20070110074A1 (en) 2004-06-04 2007-05-17 Bob Bradley System and Method for Synchronizing Media Presentation at Multiple Recipients
US8443038B2 (en) 2004-06-04 2013-05-14 Apple Inc. Network media device
US10972536B2 (en) 2004-06-04 2021-04-06 Apple Inc. System and method for synchronizing media presentation at multiple recipients
CN100407678C (en) * 2004-09-01 2008-07-30 株式会社Ntt都科摩 Wireless communication device, a wireless communication system and a wireless communication method
RU2008102061A (en) * 2005-06-20 2009-07-27 Конинклейке Филипс Электроникс Н.В. (Nl) SYSTEM AND METHOD FOR TRANSMISSION OF IMAGES BETWEEN ADAPTIVE ON THE SPECTRUM OF RADIO DEVICES WITHOUT REPEATING IMAGES
US9661376B2 (en) * 2005-07-13 2017-05-23 Polycom, Inc. Video error concealment method
CN101193292A (en) 2006-11-24 2008-06-04 联想(北京)有限公司 A wireless video receiving method and device based on multi-carrier technology
US8355435B2 (en) * 2007-06-15 2013-01-15 Freescale Semiconductor, Inc. Transmission of packet data
CN101938322B (en) 2009-07-03 2012-11-28 中兴通讯股份有限公司 Bandwidth adaptive data grading protection method and device
US20110125783A1 (en) * 2009-11-19 2011-05-26 Whale Peter Apparatus and method of adaptive questioning and recommending
CN103475851A (en) * 2013-09-05 2013-12-25 齐齐哈尔大学 Dynamic encoding device and method based on bandwidth detection
CN107948605B (en) * 2017-12-11 2020-09-08 日立楼宇技术（广州）有限公司 Method, device and equipment for storing vehicle-mounted monitoring video data and storage medium
US10993274B2 (en) 2018-03-30 2021-04-27 Apple Inc. Pairing devices by proxy
US10783929B2 (en) 2018-03-30 2020-09-22 Apple Inc. Managing playback groups
US11297369B2 (en) 2018-03-30 2022-04-05 Apple Inc. Remotely controlling playback devices
US10614857B2 (en) 2018-07-02 2020-04-07 Apple Inc. Calibrating media playback channels for synchronized presentation
CN117615137B (en) * 2024-01-15 2024-04-09 北京铁力山科技股份有限公司 Video processing method, device, equipment and storage medium

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0402954A2 (en) * 1989-06-16 1990-12-19 Harris Corporation Prioritizized image transmission system and method

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3089475B2 (en) * 1989-06-21 2000-09-18 ソニー株式会社 Digital image signal encoding device
US5686961A (en) * 1992-01-27 1997-11-11 Harris Corporation Automatic video image data reduction and prioritization system and method
US5805762A (en) * 1993-01-13 1998-09-08 Hitachi America, Ltd. Video recording device compatible transmitter
JP3261844B2 (en) 1993-01-13 2002-03-04 株式会社日立製作所 Digital video recording device and recording method
US5576902A (en) 1993-01-13 1996-11-19 Hitachi America, Ltd. Method and apparatus directed to processing trick play video data to compensate for intentionally omitted data
US5614952A (en) * 1994-10-11 1997-03-25 Hitachi America, Ltd. Digital video decoder for decoding digital high definition and/or digital standard definition television signals
ES2211725T3 (en) * 1995-04-28 2004-07-16 Matsushita Electric Industrial Co., Ltd. DATA TRANSMISSION METHOD
US5768533A (en) * 1995-09-01 1998-06-16 National Semiconductor Corporation Video coding using segmented frames and retransmission to overcome channel errors
US6111863A (en) * 1995-12-29 2000-08-29 Lsi Logic Corporation Method and apparatus for the dynamic allocation of signal bandwidth between audio, video and data signals
JP3216534B2 (en) * 1996-08-29 2001-10-09 三菱電機株式会社 Multiplexing method
JP3462024B2 (en) * 1996-12-04 2003-11-05 株式会社東芝 Transmission control method for network system
JP3193947B2 (en) 1997-01-08 2001-07-30 株式会社ディジタル・ビジョン・ラボラトリーズ Data transmission system and data transmission method
KR100338801B1 (en) * 1997-07-31 2002-08-21 삼성전자 주식회사 digital data encoder/decoder method and apparatus
US6091777A (en) * 1997-09-18 2000-07-18 Cubic Video Technologies, Inc. Continuously adaptive digital video compression system and method for a web streamer

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0402954A2 (en) * 1989-06-16 1990-12-19 Harris Corporation Prioritizized image transmission system and method

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
MASOUD KHANSARI ET AL: "Low Bit-Rate Video Transmission over Fading Channels for Wireless Microcellular Systems", IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS FOR VIDEO TECHNOLOGY, IEEE SERVICE CENTER, PISCATAWAY, NJ, US, vol. 6, no. 1, 1 February 1996 (1996-02-01), XP011014283, ISSN: 1051-8215 *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2849393A1 (en) * 2012-06-29 2015-03-18 Huawei Technologies Co., Ltd Method and device for transmitting video data
EP2849393A4 (en) * 2012-06-29 2015-04-08 Huawei Tech Co Ltd Method and device for transmitting video data
WO2020006291A1 (en) * 2018-06-28 2020-01-02 Apple Inc. Priority-based video encoding and transmission
CN112335244A (en) * 2018-06-28 2021-02-05 苹果公司 Priority-based video encoding and transmission
US11451788B2 (en) 2018-06-28 2022-09-20 Apple Inc. Rate control for low latency video encoding and transmission
US11496758B2 (en) 2018-06-28 2022-11-08 Apple Inc. Priority-based video encoding and transmission
CN112335244B (en) * 2018-06-28 2022-12-23 苹果公司 Priority-based video encoding and transmission
US11653026B2 (en) 2018-06-28 2023-05-16 Apple Inc. Video encoding system

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